SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/ski-symbol-blue-square

On a US trail map, what does a blue square mean?

More difficult, intermediate terrain.

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  1. Easiest
  2. Closed trail
  3. More difficult ✔

Why: Blue squares are a step up from green circles. Check the symbols off each lift before you ride it.

Huh, didn't know that: PNSAA says to check your trail map and make sure the symbols off a lift fit your ability.

The dad joke
What do you call a blue run with a cold? A sniffle-square.
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References

Answer: More difficult. Blue squares are a step up from green circles. Check the symbols off each lift before you ride it.

  1. NSAA Ski Safety U.S.: Know Before You Go (Trail Signage) skisafety.us/know-before-you-go
    Blue Square: More Difficult
    Checked 2026-10-11.
  2. Washington RCW 79A.45 (ski areas) app.leg.wa.gov/rcw/default.aspx?cite=79A.45&full=true
    classified "easiest", "more difficult", and "most difficult"
    Checked 2026-10-11.

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Test yourself in the game

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That's stuff everyone should know.